OSSC Profiles for PAL users

[Opaque79]

It’s possible that your TV will not accept the signal from the profiles. They won’t work on all displays.

[Ruud85]

But then it’s still weird that on the settings that do work my everdrive doesn’t

[Opaque79]

Ah. Sorry, I can’t help there, never used an everdrive.

[Opaque79]

New info.

As you may have seen, these profiles cut off some of the image in PAL games. If the loss of images bothers you, increase the V. Active to any value between 240 and 288. Some of you may have known this already. Not sure if it gives any extra sharpness though.

EDIT: Of course, it will depend on your display whether this works.

[Opaque79]

However, I am a little concerned recommending that as I believe forcing a 1600×1440 image can damage the TV but I guess it would be just the same as generic 4x mode displaying a 1280×1152 image?

[feixlweixl]

Thank you for the profiles!
I wondered if someone has created some PAL profiles and boom, here I am 🙂
I’m about to test things out, play a little with the phase in a N64 test suite and then I’ll report back.
Thanks again and all the best,
Felix

[asdddsa]

Hello, I wanted to connect an old PAL 4: 3 576i video camera, but using the above “Generic 4:3” profile resulted in the image being displayed in the 16: 9 aspect ratio – the image was stretched. I have read a bit about the PAL signal itself in the book “Video Demystified A Handbook for the Digital Engineer 4th ed – Keith Jack” and you can find a solution there based on the graph analysis on page 48.

We know, from 576i graph mentionet above, that 576i has 720 active horizontal samples (h_active), for 4:3 ratio total samples (h_total) will be:

h_total = h_active / 0,75

h_synclen = h_active * 0,0904716073147257
h_backporch = h_active * 0,0890625

v_active = 270
v_backporch = 312 – v_active – 14

So:
h_total : 960
h_active : 720
h_synclen : 65
h_backporch : 86

v_active : 270
v_backporch : 28

It works perfect 🙂

[Opaque79]

Some minor tweaks made to the profiles and are updated for firmware version 0.89. I should probably give a reminder that the “PAL” profile is just a default profile with compatibility tweaks for problematic displays. The rest are for various consoles.

Hope people are still finding these useful

[DiabboVerdde]

hey @Opaque79, did you create all these profiles from scratch or did you base yourself in NTSC profiles? if you did use NTSC profiles as base, what would be the first things to modify on an NTSC profile to make it PAL? at least as a starting point of course, then tweak it until it gets perfect.

I’m asking because i’m trying to create a PAL profile for the Neo Geo, and your PAL profiles worked really well for me, so I want to follow the same methodology you used.

• This reply was modified 1 year, 9 months ago by DiabboVerdde.

[Opaque79]

I think I did them from scratch but this site helped out a bit

https://junkerhq.net/xrgb/index.php/Optimal_timings

The sample rates weren’t much different to NTSC though some console do need a different sample rate. If a PAL Neo Geo fits the 240P or 224p image in the PAL frame, the sample rate may be the same as NTSC but I would just try and eye ball it. If you have the 240p Test Suite for the Neo Geo, you can use the checkerboard pattern to dial it in as FireBrandX demonstrated in his tutorial video

[Author]

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